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1992 Cageless Shark-diving Expedition
The 1992 cageless shark-diving expedition was the world's first recorded intentionally cageless dive with great white sharks, contributing to a change in public opinions about the supposed ferocity of these animals. History The dive took place in January 1992, during the filming of the National Geographic documentary ''Blue Wilderness'', at Dyer Island, South Africa. After 8-10 large Great White sharks had been kept around their boat for about 6 hours using chum and sea mammal flesh, four scuba divers carried out the world's first recorded dive amongst these animals without a safety cage, or any other protection, like chain-mail suits. The divers were Ron and Valerie Taylor, notable Australian film-makers and pioneers of underwater exploration, their friend George Askew, a South African diver and photographer, and Piet 'PJ' van der Walt, who had founded the South African cage-diving industry in 1988. The Taylors and Askew, recognised shark experts and authorities, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Shark
The great white shark (''Carcharodon carcharias''), also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is notable for its size, with larger female individuals growing to in length and in weight at maturity. However, most are smaller; males measure , and females measure on average. According to a 2014 study, the lifespan of great white sharks is estimated to be as long as 70 years or more, well above previous estimates, making it one of the longest lived cartilaginous fishes currently known. According to the same study, male great white sharks take 26 years to reach sexual maturity, while the females take 33 years to be ready to produce offspring. Great white sharks can swim at speeds of 25 km/h (16 mph) for short bursts and to depths of . The great white shark is an apex predator, as it has no known natural predators other than, on v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tiger Shark
The tiger shark (''Galeocerdo cuvier'') is a species of requiem shark and the last extant member of the family Galeocerdonidae. It is a large macropredator, capable of attaining a length over . Populations are found in many tropical and temperate waters, especially around central Pacific islands. Its name derives from the dark stripes down its body, which resemble a tiger's pattern, but fade as the shark matures. The tiger shark is a solitary, mostly nocturnal hunter. It is notable for having the widest food spectrum of all sharks, with a range of prey that includes crustaceans, fish, seals, birds, squid, turtles, sea snakes, dolphins, and even other smaller sharks. It also has a reputation as a "garbage eater", consuming a variety of inedible, man-made objects that linger in its stomach. Though apex predators, tiger sharks are sometimes taken as prey by groups of killer whales. It is considered a near threatened species because of finning and fishing by humans. The tiger s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Diving
Scientific diving is the use of underwater diving techniques by scientists to perform work underwater in the direct pursuit of scientific knowledge. The legal definition of scientific diving varies by jurisdiction. Scientific divers are normally qualified scientists first and divers second, who use diving equipment and techniques as their way to get to the location of their fieldwork. The direct observation and manipulation of marine habitats afforded to scuba-equipped scientists have transformed the marine sciences generally, and marine biology and marine chemistry in particular. Underwater archeology and geology are other examples of sciences pursued underwater. Some scientific diving is carried out by universities in support of undergraduate or postgraduate research programs, and government bodies such as the United States Environmental Protection Agency and the UK Environment Agency carry out scientific diving to recover samples of water, marine organisms and sea, lake or riverb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
January 1992 Events In Africa
January is the first month of the year in the Julian and Gregorian calendars and is also the first of seven months to have a length of 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere (where it is the second month of winter) and the warmest month of the year within most of the Southern Hemisphere (where it is the second month of summer). In the Southern hemisphere, January is the seasonal equivalent of July in the Northern hemisphere and vice versa. Ancient Roman observances during this month include Cervula and Juvenalia, celebrated January 1, as well as one of three Agonalia, celebrated January 9, and Carmentalia, celebrated January 11. These dates do not correspond to the modern Gregorian calendar. History January (in Latin, ''Ianuarius'') is named after Janus, the god of beginnings and transitions in Roman mythology. Traditionally, the original Roman calendar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1992 In South Africa
The following lists events that happened during 1992 in South Africa. Incumbents * State President: F.W. de Klerk.Archontology.org: A Guide for Study of Historical Offices: South Africa: Heads of State: 1961-1994 (Accessed on 14 April 2017) * Chief Justice: Michael Corbett. Events ;January * 11 – Singer is the first major artist to tour South Africa after the ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1992 In Biology
Year 199 ( CXCIX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was sometimes known as year 952 ''Ab urbe condita''. The denomination 199 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Mesopotamia is partitioned into two Roman provinces divided by the Euphrates, Mesopotamia and Osroene. * Emperor Septimius Severus lays siege to the city-state Hatra in Central-Mesopotamia, but fails to capture the city despite breaching the walls. * Two new legions, I Parthica and III Parthica, are formed as a permanent garrison. China * Battle of Yijing: Chinese warlord Yuan Shao defeats Gongsun Zan. Korea * Geodeung succeeds Suro of Geumgwan Gaya, as king of the Korean kingdom of Gaya (traditional date). By topic Religion * Pope Zephyrinus succeeds Pope Victor I, as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jaws (film)
''Jaws'' is a 1975 American thriller film directed by Steven Spielberg, based on the 1974 novel by Peter Benchley. It stars Roy Scheider as police chief Martin Brody, who, with the help of a marine biologist ( Richard Dreyfuss) and a professional shark hunter ( Robert Shaw), hunts a man-eating great white shark that attacks beachgoers at a summer resort town. Murray Hamilton plays the mayor, and Lorraine Gary portrays Brody's wife. The screenplay is credited to Benchley, who wrote the first drafts, and actor-writer Carl Gottlieb, who rewrote the script during principal photography. Shot mostly on location on Martha's Vineyard in Massachusetts, ''Jaws'' was the first major motion picture to be shot on the ocean, and consequently had a troubled production with issues such as going over budget and past schedule. As the art department's mechanical sharks often malfunctioned, Spielberg decided mostly to suggest the shark's presence, employing an ominous and minimalist theme cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Rutzen
Michael Rutzen (born 11 October 1970) is a South African conservationist, film maker and cage diving operator. Since the beginning of his career as a conservationist, Rutzen has provided field support to the Department of the Environmental Affairs of South Africa. Some projects include deployment of satellite and acoustic tags on white sharks. He is also a member of the Whale Disentanglement Network for the Department of Environmental Affairs. Since 2009, he has acted as field supervisor for population dynamics studies and DNA sampling programs being undertaken for the PhD study of Dr. Sara Andreotti (Stellenbosch University), which he also sponsored and co authored a number of white shark behavioural papers. He is one of the inventors of the eco-friendly Shark Safe Barrier, which prevents negative encounters between sharks and people. He is currently preparing the barrier for final testing and deployment for protecting sharks and people. Early life Rutzen was born in Joh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andre Hartman
Andre Hartman (born in Bellville, Western Cape, South Africa, 9 August 1953) is a South African diving guide best known for his work with great white sharks. In a Discovery Channel documentary known as "Great White Sharks: Uncaged" he is filmed free-diving unprotected with several great white sharks. He is also seen free-diving with a white shark along with Jean-Michel Cousteau in one of Cousteau's documentaries, where he shows Jean-Michel how to grab a ride on the shark's dorsal fin. Another video, from Tow Surfing Adventures, shows Andre not only free-diving with a white, but petting it as it swims by, and even touching its nose as it opens its mouth toward him. Hartman also appeared on an episode of MTV's "Wildboyz", in which Steve O and Chris Pontius jumped off a boat with a great white shark. Hartman also did a trip with Steve Irwin off Gansbaai, South Africa in 2004. In February 2004, while chumming Chumming (American English from Powhatan) is the blue water fishing pra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great White Shark
The great white shark (''Carcharodon carcharias''), also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is notable for its size, with larger female individuals growing to in length and in weight at maturity. However, most are smaller; males measure , and females measure on average. According to a 2014 study, the lifespan of great white sharks is estimated to be as long as 70 years or more, well above previous estimates, making it one of the longest lived cartilaginous fishes currently known. According to the same study, male great white sharks take 26 years to reach sexual maturity, while the females take 33 years to be ready to produce offspring. Great white sharks can swim at speeds of 25 km/h (16 mph) for short bursts and to depths of . The great white shark is an apex predator, as it has no known natural predators other than, on v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanic Whitetip Shark
The oceanic whitetip shark (''Carcharhinus longimanus''), also known as shipwreck shark, Brown Milbert's sand bar shark, brown shark, lesser white shark, nigano shark, oceanic white-tipped whaler, and silvertip shark, is a large pelagic requiem shark inhabiting tropical and warm temperate seas. Its stocky body is most notable for its long, white-tipped, rounded fins. Though slow-moving, it is opportunistic and aggressive, and is reputed to be dangerous to shipwreck survivors. Recent studies show steeply declining populations because its large fins are highly valued as the chief ingredient of shark fin soup, and as with other shark species, the whitetip faces mounting fishing pressure throughout its range. Taxonomy The oceanic whitetip shark, or lesser white shark, was described in 1831 by naturalist René-Primevère Lesson, who named the shark ''Carcharhinus maou''. It was next described by Cuban Felipe Poey in 1861 as ''Squalus longimanus''. The name ''Pterolamiops longimanus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bull Shark
The bull shark (''Carcharhinus leucas''), also known as the Zambezi shark (informally zambi) in Africa and Lake Nicaragua shark in Nicaragua, is a species of requiem shark commonly found worldwide in warm, shallow waters along coasts and in rivers. It is known for its aggressive nature, and presence mainly in warm, shallow brackish and freshwater systems including estuaries and lower reaches of rivers. Bull sharks are euryhaline and can thrive in both salt and fresh water. They are known to travel far up rivers, and have been known to travel up the Mississippi River as far as Alton, Illinois, about from the ocean, but few freshwater interactions with humans have been recorded. Larger-sized bull sharks are probably responsible for the majority of nearshore shark attacks, including many incidents of shark bites attributed to other species. Unlike the river sharks of the genus '' Glyphis'', bull sharks are not true freshwater sharks, despite their ability to survive in freshwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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